Textured surface having undercut micro recesses in a surface

Abstract

Textured surface having micro recesses such that the outer surface overhangs the micro recesses. Embodiments of the textured surface include sharp edges for promoting bone deposition and growth within the micro recesses, protrusions of varying depth from the surface that include overhangs, and micro recesses that are at least partially defined by complex ellipsoids.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation-in part of U.S. application Ser. No. 09 / 976,722 filed Oct. 12, 2001, now U.S. Pat. No. 6,599,322 which claims the benefit of U.S. Provisional Application No. 60 / 264,084 filed, Jan. 25, 2001, and U.S. Provisional Application No. 60 / 309,923, filed Aug. 3, 2001. This application is also a continuation-in-part of U.S. application Ser. No. 10 / 021,616, filed Dec. 12, 2001, now U.S. Pat. No. 6,620,332 which claims benefit of U.S. Provisional Application 60 / 291,022, filed May 15, 2001. This application, furthermore, claims the benefit of priority of U.S. Provisional Application No. 60 / 340,286, filed Dec. 12, 2001, U.S. Provisional Application No. 60 / 356,459, filed Feb. 11, 2002, U.S. Provisional Application No. 60 / 388,033, filed Jun. 12, 2002, and U.S. Provisional Application No. 60 / 391,957, filed Jun. 25, 2002.BACKGROUND OF THE INVENTION[0002]1. Field of the Invention[0003]The invention relates to the productio...

AI Technical Summary

Benefits of technology

[0011]A still further embodiment provides recesses in a desired pattern which is measurable and predictable, and which can be duplicated and repeated precisely in any selected number of surfaces and method of producing a textured surface.

[0028]In accordance with a still further embodiment of the invention, there is provided a surgical implant comprising an article having a datum surface for abutting engagement with a bone, and a multiplicity of undercut micro recesses in the datum surface, such that the body exhibits a greater fractal area at a level below the surface than is exhibited at the surface. Intersections of the recesses and the datum surface define sharp edges adapted to cut the bone and produce bone particulates. The recesses are adapted to receive and retain the bone particulates cut from the bone by the edges, to stimulate ingrowth of the bone into the recesses.

Problems solved by technology

While an improvement over untreated metal, questions have arisen over the longevity of usefulness of the implanted devices utilizing such surfaces.

It is questionable whether there is substantial genuine adhesion.

It is believed that the voids formed by the spheres are not sufficient for long-term nourishment of ingrowing tissue and / or bone.

Further, there have been failures of prosthetics treated in this manner because of the fusing process adversely affecting metallurgical properties. of the implant material, and because of difficulties in removing manufacturing contaminants, such as cutting oils, from the fused sphere network.

Still further, the original datum surface, which can be accurately determined, is lost by the application of the coating spheres.

The processes therein described have been found lacking in precise control over the degree and extent of roughness or texturing.

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